Feature: Updates CPU check to new provider

[LordHepipud]

Updates Invoke-IcingaCheckCPU to use new data providers directly from the Icinga PowerShell Framework.

Breaking change:

• The new metrics will now be separated between the actual sockets of the system, allowing an overview on multi socket systems, which CPU is assigned more loads
• Metrics will now be separated by 0_1, which in this example is socket 0 and core 1.